code: def test_failed_to_get_replica_context(self):
      async def model_load_func(model_id: str):
          return model_id
  
      with pytest.raises(
          RuntimeError, match="Fail to retrieve serve replica context"
      ):
          _ModelMultiplexWrapper(
              model_load_func, None, max_num_models_per_replica=2
          )
  
imports: import asyncio
  import os
  from typing import List
  import pytest
  import requests
  import ray
  from ray import serve
  from ray._private.test_utils import SignalActor, wait_for_condition
  from ray._private.utils import get_or_create_event_loop
  from ray.serve._private.constants import SERVE_MULTIPLEXED_MODEL_ID
  from ray.serve.context import _get_internal_replica_context
  from ray.serve.handle import RayServeHandle
  from ray.serve.multiplex import _ModelMultiplexWrapper
label_desc: Use image node_id 1 for calling the TestMultiplexWrapper obj's underlying member method code with example usage: obj.test_failed_to_get_replica_context() and returns: model_id